Gas-compressor valve mechanism.



G. W.- MILES.

GAS GDMPBESSOR VALVE MECHANISM.

. APPLICATION FILED we. a, 1913.

1,092,782. Patented Apr. 7, 1914 CASPER w. MILES,

STEPHEN S. MILES, OF GREENSBORO, NORTH CAROLINA.

Specification of Iietters Patent. Application filed August 8, 1913.Serial No. 783,764.

eas-comranssoa vanva ntncnamsivi.

Patented Apr. '7, 191%.

To all whom it may concern: 1 Be it known that I, CASPER W. Mrnas, acitizen of the United States, residing in Anderson township, in thecounty of Hamilton and State of Ohio, have invented certain new anduseful Improvements in Gas-Oompressor Valve Mechanism,of which thefolowing is a specification. 1

My invention relates to improvements 111 gas compressor valve mechanism.

One of its objects is to provide and adapt ballvalves to use forcompressing gases. 7

Another object .is to provide improved valve cages and seats to supportand. retain the valves in place.

Another object is to employ such valves and avoid excessive clearancespaces and losses from reexpansion.

Another object is to avoid breakage of valves and in ury from the escapeinto the cylinder of partsof broken valves.

My invention also comprises certain details of form, co'mbinationandarrangement, all of which will be fully set forth in the description ofthe accompanying drawings, in which: I

Figure 1 'is a central vertical section through a gas compressorembodying m invention. Fig.2 is an enlarged sectiona detail of the exitvalve and its cage and seat. Fig. 3-is an inside plan view of part ofthe exit -valve cage. Fig. 4 is an enlarged sectional detail of theinlet valve and its cage and seat, illustrating a modification. Fig. 5is a plan view of the seat portion of the cage of Fig. 4 detached. 7

\ The accompanying drawings represent the preferred embodiments of myinvention in which A represents the base of a compressor, B representsthe driving shaft journaled in bearings in heads detachably secured tothe base, and 0 represents an eccentric rigidly I mounted upon the shaftB. The cylinder is composed of two independent concentric tubularmembers 2 and 3 which are clamped between the base A and the cylinderhead A by means of stud bolts 5 and nuts 6.

- F represents the piston and H a pitman engaging the-eccentric O at oneend and-con nected by a pin N to the piston at-the opposite end.

The exit valve 7 which may be a sphere of metal, preferably temperedsteel, is mounted ma cage or container formed in the cylinder head, andcomprising a valve seat member 8, which is closely fitted into a seat inthe cylinder head and held in place therein by a ca 9. The member 8 hasa narrow annular va ve seat 10 upon which the valve normally rests, andwhich is so located with reference to the valve as to form a stablesupport for the valve of comparatively large diameter, and with the faceof the valve seat approximating an angle of forty five degrees-withreference to the vertical axis of the valve, as a steeper angle would beliable to cause the valve to wedge into and stick to the valve seat.Below the valve seat the member 8 is preferably leftopen at 11 for thefree passage of gas to the valve, and above the valve seat the member 8is recessed at 12 for the free upward passage of the gas around thevalve. The cap 9 is detachably secured by bolts 14 to the upper face ofthe cylinder head, thereby also looking the member 8 firmly in place.The cap 9 is provided with a hemispherical recess 15 to receive theupper portion of'the valve, and from which recess a series of smallports 16 lead to the exit gas conduit 17.

The inlet valve 18 is externally spherical and may be either of solidmetal or hollow. For valves of the larger sizes theintake valves arepreferably made hollow but with walls sufficiently thick to render themsub stantially rigid. This may be attained by welding together the edgesof two hemispherical cups, and then tempering the hollow sphere andgrinding it true. The 1101- low in inlet valves of larger sizespreserves approximately the requisite weight in the valves to properlylift and seat them, while in the exit valves which are smaller and actedupon by gas under pressure the weight of a solid sphere is notobjectionable.

The intake valve is provided with a valve seat member 19 seated in arecess in the cylindrical portion of the piston, said member 19 beingprovided with a narrow annular valve seat 20. The space D across-thecenter of valve below the valve seat is to be as large as practical andpreserve the face of the Bill valve seat at a mean angle that will notpermit the valve to wedge into and stlck to the valve seat. This area ofthe valve face ex posed below the valve seat determines the'sensitiveness of the valve or the ease or readiness with which it willhit from its seat to take gas above the piston. The up-. er portion ofthe intake valve cage is ormed by the piston head 21 which-is bolted inplace upon the cylindrical portion E of the'piston and locks the member19 in place. A narrow space 22 is provided surrounding the intake valveabove its seat to enable the valve to lift and the gas to pass upwardaround the valve. 1

From the space 22 the gas escapes through a plurality of short ports 24through the the modification Fig. 4-the portion of the.

valve seat member 19 below the valve seat is not entirely cut away butis rovided with a series of perforations 27 an a curved re-- cess orchamber 28 beneath the valve through which the gas enters and acts uponthe lower face of the intake valve, The valve-seat member of the exitvalve may'also .be constructed as illustrated in Fig. 4 if desired.While there is practically no liability of such spherical valvesbecoming fractured, yet should such occur the valve cage as hereinillustrated, particularly in Fig. 4 would prevent any part of the valveing esca ing from its cageto a place where it mig t o in ury to otherparts of the compressor. In Fig. 4 I have also illustrated in crosssection the hollow spherical intakevalve in which 29 represents theshellor wall of the-valve and 30 the hollow space therein. The passagesthrough the valves are particularly free from fnction producangles orpro'ections. am thus ena led to produce gas compressor valve mechanismin which-the valves are sensitive due to the large surface exposed belowthe valve seats, in which the valve seat is comparatively narrow andable to readily clear its face of any dirt or foreign matter, in' whichthere is ample space for the gas to pass freely around the valve, inwhich the valve continually and automatically presents new wearingfaces,

in which there are no stems, springs or readily breakable parts, and inwhich broken parts can not escape from the valve cages.

The mechanism herein illustrated is capable of considerable modificationwithout departing from the principle of my invention.

Having described my invention, what I claim is:

1. A ,gas compressor valve mechanism comprising a spherical valve, acage member beneath said valve provided with a central gas inlet POI'Jand an annular raised valve seat encircling said inlet port, and a cagemember above said valve provided with a plurality of gas. exit ports,said cage said valve and affording a passage for the.

of the circumference of said valve, and a cage member above said valveprovided with one or more gas exit orts, sald cage members beinilockedtoget er and provided with a recess a ove said valve seat envelopingsaid valve to limit the movement of the valve and valve.

3. A gas compressor valve mechanism comprising a spherical valve adivided valve cage inclosing said valve and forming a partly sphericalchamber enveloping the valve, an annular inwardly projecting valve seatto su port the valve concentrically within sai chamber, and gas intakeand exit ports leading to and from said chamber.

. provide a passage for the gasaround said 4. A gas compressor valvemechanism comprising a hollow spherical valve a divided valve ca eforming a substantially concentric cham er inclosing .saidvalve, anannular inwardly projecting valve seat supporting said valve inasubstantially concentric position within said chamber, and gas intakeand .exit p'orts leading to and from said' chamber.

5. In a gas compressor valve mechanism an intake valve and an exit valveeach comprising a spherical valve, a cage forming a chambers.

6. In a gas compressor valvemechanism an exit valve located in thecylinder head and an intake valve located inthe piston each comprising aspherical valve, a cage In testimony whereof I have afixed my forining aslbstantially conclentric ciamber signature in presence of twowitnesses. inc osing sai va ve, an annu ar raise valve seat to $11 portsaid valve within said cham- CASPER M 5 her free cm the Walls thereof,and gas in- Witnesses:

take and exit ports leading to and from said W. THORNTON Bosne'r,chambers. B. R. KROPF.

